From The Stargate Omnipedia
Vyan researcher prior to the Vorlix outbreak on Vyus. His notes would teach Ke'ra much. Zervis spoke of the Stargate, as well as the arrival of a visitor from beyond the stars named Linea. Zervis did not survive the Vorlix, but his notes were crucial to restoring the memories of the Vyans.
Past and Present - Ke'ra explains that she has learned much from Dr. Zervis's notes, including the arrival of an off-worlder named Linea.